Thanks for coming back to me.
[...] human beings are difficult to please, and we are rarely satisfied with what we get.
This indeed looks like being a definition of human beings :D
So in fact, here the real problem is the management and not the demands by themselves. I imagine that many are aware of this (at least you are, as probably), so that there is a chance to see a good evolution soon, isn't there?
RE: Importance of production indicators in livestock systems